A movable ejector pin type ceramic tile back pattern venting mold core, method and product

Abstract

This invention provides a movable ejector pin type ceramic tile back pattern venting mold core, method, and product, including a mold core body, venting holes, a movable ejector pin, a powder cleaning plate, and a return plate. The movable ejector pin is cylindrical and includes a piston head, a piston, an ejector pin body, and an ejector pin tip. The piston head is located at one end of the movable ejector pin and is connected to the piston. The other end of the piston is connected to the ejector pin body. The tip of the ejector pin tip is connected to the ejector pin tip, and a soft adhesive is disposed at the other end of the ejector pin tip. The soft adhesive is installed on the ejector pin tip in a manner that completely covers the other end of the ejector pin tip. According to this invention, multi-directional dovetail grooves can be formed to significantly improve bonding strength, while also venting, achieving automated production, greatly reducing manual operation, and lowering production costs.

Description

Technical Field

[0001] This invention belongs to the field of ceramic production and manufacturing, specifically relating to a movable ejector pin type ceramic tile back pattern venting mold core, method and product. Background Technology

[0002] Currently, the traditional ceramic tile forming process involves pressing powder into a mold cavity in a press. To increase the bonding area during installation, various raised textures, commonly known as back patterns, are created on the back. The height difference of these back patterns leads to differences in the density of the tile body at corresponding locations, affecting the difference in shrinkage during firing. This results in poor tile surface flatness, and in severe cases, even a "through" effect (showing through the tile). Furthermore, the height of the back pattern's protrusion is limited, thus reducing bonding strength. When tiling walls, due to the difference in material properties between ceramic tiles and tile adhesive or cement mortar, and under extreme weather conditions such as wind, sun, and rain, the inconsistent thermal expansion and contraction rates of the materials can easily cause tiles to detach.

[0003] To address the issue of tile bonding strength, Patent Document 1 discloses a device and method for manufacturing anti-detachment tile back patterns. This method uses a component that can move obliquely to form a tile back pattern with a parallelogram-like cross-section. Within the entire tile, this pattern manifests as oblique column grids or grooves in different directions, thereby improving the tile's bonding strength. However, this technology, using an obliquely moving component, can only create oblique groove patterns.

[0004] Existing technical documents:

[0005] Patent documents:

[0006] Patent document 1: Chinese Patent Publication CN108407051A. Summary of the Invention

[0007] The problem the invention aims to solve:

[0008] To address the aforementioned problems, the present invention aims to provide an active ejector-type tile back pattern venting mold core, method, and product that can simultaneously achieve venting and the formation of multi-directional dovetail groove back patterns to improve the bonding strength during product installation.

[0009] Technical means to solve the problem:

[0010] This invention provides a movable ejector pin type ceramic tile back pattern venting mold core, comprising a mold core body, vent holes, movable ejector pins, a powder cleaning plate, and a return plate. The return plate, the powder cleaning plate, and the mold core body are tightly installed sequentially from top to bottom. The mold core body is provided with a plurality of vent holes, which penetrate the mold core body. The powder cleaning plate is provided with a powder blowing and suction channel communicating with the vent holes. A retractable movable ejector pin is provided inside the vent holes, which penetrates the return plate, the powder cleaning plate, and the mold core body. The powder cleaning plate is also provided with a blowing and suction function. The air vent, one end of which is connected to the suction machine, and the other end of which is connected to the powder blowing and suction channel, is characterized in that: the movable ejector pin is a cylinder, including a piston head, a piston, an ejector pin body, and an ejector pin head; the piston head is disposed at one end of the movable ejector pin, and one end of the piston head is connected to the piston; the other end of the piston is connected to the ejector pin body, and the tip of the ejector pin body is connected to the ejector pin head; the other end of the ejector pin head is provided with a soft colloid; the soft colloid is installed on the ejector pin head in a manner that completely covers the other end of the ejector pin head.

[0011] Alternatively, in this invention, the soft colloid is formed into a cylindrical shape with the same diameter as the ejector pin. A groove is formed around the outer surface of the cylinder in the circumferential direction, and a corresponding flange is formed on the tip of the ejector pin. The two are detachably installed and fixed by engaging. This allows for convenient and quick replacement of the soft colloid according to actual needs, expanding the applicability of the device and improving equipment maintainability and layout flexibility.

[0012] Alternatively, in this invention, the soft colloid is bonded and fixed to the other end of the ejector pin using an adhesive.

[0013] Alternatively, in this invention, the soft colloid may be polyurethane or vulcanized rubber.

[0014] Alternatively, in this invention, the hardness of the soft colloid is 50 to 80 Shore hardness.

[0015] Alternatively, in this invention, the soft colloids may be arranged at the same height or at different heights in a random or orderly manner.

[0016] Alternatively, in this invention, the soft colloid protruding from the ejector pin head can be formed into a cylindrical shape other than a cylinder.

[0017] Alternatively, in this invention, the soft colloid may be formed in the same shape and / or size, or in a combination of multiple shapes and / or sizes.

[0018] This invention provides a method for manufacturing ceramic tiles using the aforementioned multi-directional dovetail groove ceramic tile back pattern venting mold core, comprising the following steps:

[0019] Ceramic powder is pre-placed in the press mold cavity, and the mold core body descends into the press mold cavity where the powder is placed and comes into complete contact with the powder;

[0020] The blower blows air into the cylinder's ejector port. The air passes through the ejector air passage to the end of the cylinder liner hole near the ejector plate, causing the piston head of the movable ejector pin to move downwards. The ceramic powder falls off under the influence of gravity. At the same time, the soft colloid of the movable ejector pin comes into contact with the powder and is deformed by pressure, forming a multi-directional dovetail groove on the surface of the powder.

[0021] The air blower blows air into the return air port of the cylinder. The air passes through the return air passage to the end of the cylinder liner near the cleaning plate. Because the return air passage, piston head, and cleaning plate form an airtight space, the piston head of the movable ejector pin moves upward, the soft colloid is no longer under pressure, its shape is restored, and the soft colloid automatically separates from the tile body.

[0022] The ejector head retracts into the ejector sleeve and becomes level with the pressing contact part, completing the return stroke.

[0023] This invention provides a product manufactured using the aforementioned multi-directional dovetail groove ceramic tile back pattern venting mold core. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of one embodiment of the present invention;

[0025] Figure 2 for Figure 1 A magnified schematic diagram of a portion of the image;

[0026] Figure 3 for Figure 2 A schematic diagram of the ejector pin during its movement;

[0027] Figure 4 In the diagram, (a) is a schematic diagram of the movable ejector pin of the present invention, (b) is a schematic diagram of the soft colloid, and (c) is a schematic diagram of the working state of the soft colloid.

[0028] Figure 5 This is a schematic diagram of the return plate of the present invention;

[0029] Figure 6 for Figure 5 Side view;

[0030] Figure 7 for Figure 5 A schematic diagram of the AA section;

[0031] Figure 8 for Figure 5 A schematic diagram of the BB section;

[0032] Figure 9 for Figure 5 A schematic diagram of the CC section;

[0033] Figure 10 for Figure 5 A schematic diagram of the DD section;

[0034] Figure 11 This is a schematic diagram of the ejector plate of the present invention;

[0035] Figure 12 for Figure 11 A schematic diagram of the AA section;

[0036] Figure 13 This is a schematic diagram of the ejector pin sleeve of the present invention;

[0037] Figure 14 A schematic diagram of a movable ejector pin in the prior art;

[0038] Figure 15 The ceramic tile made using the multi-directional dovetail groove ceramic tile back pattern venting mold core described in this invention;

[0039] Symbol explanation:

[0040] 1: Mold core body; 11: Ejector sleeve; 2: Vent hole; 3: Movable ejector pin; 31: Piston head; 32: Piston; 33: Ejector body; 34: Ejector head; 36: Piston sealing groove; 37: Piston sealing ring; 38: Soft colloid; 4: Powder cleaning plate; 41: Powder blowing and suction channel; 42: Blowing and suction hole; 5: Return plate; 6: Ejector plate. Detailed Implementation

[0041] The present invention will be further described below with reference to the following embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the invention. The same or corresponding reference numerals in the figures denote the same components, and repeated descriptions are omitted. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] like Figure 1 As shown, a movable ejector pin type ceramic tile back pattern venting mold core includes a mold core body 1, vent holes 2, movable ejector pins 3, a powder cleaning plate 4, and a return plate 5. The return plate 5, the powder cleaning plate 4, and the mold core body 1 are installed tightly from top to bottom. The mold core body 1 is provided with several vent holes 2, which penetrate through the mold core body 1. The powder cleaning plate 4 is provided with a powder blowing and suction channel 41 that communicates with the vent holes 2. A movable ejector pin 3 that can extend and retract is provided inside the vent holes 2. The movable ejector pin 3 penetrates through the return plate 5, the powder cleaning plate 4, and the mold core body 1. The powder cleaning plate 4 is also provided with a blowing and suction hole 42. One end of the blowing and suction hole 42 is connected to a suction machine and a blowing machine, and the other end of the blowing and suction hole 42 is connected to the powder blowing and suction channel 41. During mold closing, the air suction port 42, through the suction of the air pump, creates a negative pressure in the powder suction channel 41, causing the air in the mold cavity to be quickly discharged through the vent port 2, the powder suction channel 41, and the air suction port 42. During demolding, the air suction port 42, through the air pump, blows the ceramic powder that has entered the vent port 2 out through the vent gap 12, preventing ceramic dust from accumulating in the vent port 2 and causing blockage. Preferably, the lower end face of the mold core body 1 is provided with a polyurethane rubber layer 35 with a hardness of 90 to 99 Shore A. The use of the polyurethane rubber layer 35 can prevent ceramic powder from sticking to the mold core body 1 during mold closing, thus avoiding the scrapping of the entire ceramic blank.

[0045] like Figure 13As shown, a cylindrical ejector sleeve 11 is provided inside the vent 2. The inner wall of the ejector sleeve 11 and the ejector head 34 form an venting gap 12. The outer wall of the ejector sleeve 11 is provided with a limiting part 13 and a pressing contact part 14. The pressing contact part 14 is located at the lower end of the ejector sleeve 11, and one end of the pressing contact part 14 is connected to the limiting part 13. The diameter of the limiting part 13 is smaller than the outer diameter of the ejector sleeve 11, and the diameter of the pressing contact part 14 is smaller than the limiting part 13. A chamfer is provided at the connection between the pressing contact part 14 and the limiting part 13. The limiting part 13 is used to fix the ejector sleeve 11 and prevent the ejector sleeve 11 from shifting during operation. The ejector sleeve can prevent the movable ejector 3 from directly contacting the mold core body 1, thus avoiding damage to the mold core body 1 caused by the up and down movement of the movable ejector 3.

[0046] Preferably, the cleaning plate 4 is also provided with a dustproof sealing ring 43, which is disposed in the through hole through which the movable ejector pin 3 passes, and is in close contact with the piston 32, further increasing the airtightness of the cleaning plate 4, so that air will not enter the return plate 5 through the through hole through which the movable ejector pin 3 passes.

[0047] like Figures 5-10 As shown, the return plate 5 is rectangular and includes several cylinder liner holes 51, at least one cylinder return air hole 52, at least one return air passage 53, a sealing groove 54, several internal connecting through holes 55, and several mold core connecting through holes 56. The return plate 5 is divided into an inner area A and an outer area B. The sealing groove 54 surrounds the return plate 5. The part surrounded by the sealing groove 54 is the inner area A, and the part outside the inner area A is the outer area B. The rear end of the movable ejector pin 3 is a piston head 31 nested in the cylinder liner hole 51. There are at least two rows of cylinder liner holes 51. The cylinder liner holes 51 are located in the inner area A, and each row of cylinder liner holes 51 has at least two rows of cylinder liner holes 51. The sleeve hole 51 is parallel to the edge of the return plate 5. One end of the cylinder return air hole 52 is connected to the blower or suction machine, and the other end of the cylinder return air hole 52 is connected to the return air passage 53. The other end of the return air passage 53 is connected to the end of the cylinder sleeve hole 51 near the powder cleaning plate 4. The return air passage 53, the piston head 31 and the powder cleaning plate 4 form an airtight space. A plate edge sealing ring 541 is provided in the sealing groove 54. The inner connecting through hole 55 is arranged around the two rows of cylinder sleeve holes 51 in the outer area B and the inner area A. The mold core connecting through hole 56 is arranged around the two rows of cylinder sleeve holes 51 in the outer area B and the inner area A.

[0048] The movable ejector-type venting mold of this embodiment is also provided with a through-hole sealing groove 58. The through-hole sealing groove 58 is arranged around the inner connecting through-hole 55, and a through-hole sealing ring 581 is provided in the through-hole sealing groove 58. The through-hole sealing ring 581 is an O-ring, and the plate edge sealing ring 541 is a linear sealing ring. The through-hole sealing groove 58 can prevent gas from escaping from the inner connecting through-hole 55, thereby increasing the airtightness of the entire mold.

[0049] Active ejector pin type venting mold, such as Figure 11, 12 The mold also includes an ejector plate 6, which is tightly positioned above the return plate 5. The ejector plate 6 has at least one ejection air passage 61 relative to the return air passage 53 of the return plate 5. The ejection air passage 61 connects to the end of the cylinder liner bore 51 near the ejector plate 6. The return plate 5 has a cylinder ejection air hole 57, one end of which is connected to an air blower. The other end of the cylinder ejection air hole 57 is a notch, which connects to the ejection air passage 61 when the ejector plate 6 and the return plate 5 are tightly installed. Adding the ejector plate 6 allows for control of the ejection of the movable ejector pin 3 via air blowing, significantly reducing the precision requirements of the mold.

[0050] The ejector plate 6 is also provided with an inner connecting countersunk hole 62 and a mold core connecting countersunk hole 63; when the ejector plate 6 and the return plate 5 are tightly installed, the inner connecting countersunk hole 62 is connected to the inner connecting through hole 55, and the mold core connecting countersunk hole 63 is connected to the mold core connecting through hole 56, which is used to install and fix the movable ejector pin type venting mold of this embodiment.

[0051] like Figure 4 As shown in (a)(b)(c), the movable ejector pin 3 is a cylinder, including a piston head 31, a piston 32, an ejector pin body 33, an ejector pin head 34, and a soft colloid 38 mounted on the ejector pin head 34. One end of the piston head 31 is connected to the piston 32, the other end of the piston 32 is connected to the ejector pin body 33, and the other end of the ejector pin body 33 is connected to the ejector pin head 34. A chamfer is provided at the connection between the piston 32 and the ejector pin body 33. At least one piston sealing groove 36 is provided around the side of the head end, and a piston sealing ring 37 is installed in the piston sealing groove 36. The connection between the ejector pin head 34 and the ejector pin body 33 has a 1:1 taper. The other end of the ejector pin head 34 is provided with a soft colloid 38 of the same diameter, which can be completely covered by adhesive bonding, or as shown in [other methods]. Figure 4 As shown, the connection is achieved through a snap-fit ​​mechanism. Using a soft colloid 38 prevents ceramic powder from adhering to the ejector pins 34 during mold closing, thus avoiding the scrapping of the entire ceramic blank.

[0052] Specifically, the soft colloid 38 is formed into the same cylindrical shape and diameter as the ejector head 34. A groove 381 is formed around the outer surface of the cylinder in the circumferential direction. A corresponding flange is formed on the tip of the ejector head 34. The groove 381 engages with the flange to achieve detachable fixing of the two. In other words, the soft colloid 38 is upside down on the ejector head 34. This further enhances the connection stability between the soft colloid 38 and the ejector head 34, preventing the soft colloid 38 from falling off during demolding. At the same time, it allows for convenient and quick replacement of the soft colloid 38 according to actual needs, expanding the applicability of the device and improving equipment maintainability and layout flexibility. Furthermore, for ease of installation, the end of the soft colloid 38 that engages with the ejector head 34 is formed into an arc shape, but it is not limited to this.

[0053] Furthermore, the soft colloid 38 has a hardness of 50 to 80 Shore A, which shortens molding time and facilitates demolding. During the pressing process, the elastic deformation of the soft colloid 38 can be compressed by approximately 15% to 30%, preferably around 20%. For example, when the pressing depth of the mold core 1 is 0.5 to 4 mm, the depth of the multi-directional dovetail groove formed on the back of the tile by the soft colloid 38 is 0.4 to 3.2 mm. Such a dovetail groove is suitable for large, thin slabs and is less likely to penetrate the bottom. It satisfies both the necessary pull-out force for the tile and the application requirements for thinner tiles. The soft colloid 38 is made of polyurethane, vulcanized rubber, black rubber, or other materials with similar properties, possessing the structural characteristics of elastic deformation under pressure and recovery upon release of pressure. Furthermore, the soft colloid 38 is softer than the polyurethane rubber layer 35, exhibiting superior deformation performance and anti-powder adhesion properties. Furthermore, the soft colloid 38 is in a sub-liquid state, and the pressure at each point is the same when a liquid is pressed. When the powder is formed, the pressure at each position of the dovetail groove is relatively close, and the density of the powder at each position of the dovetail groove is relatively close. During kiln firing, it can better prevent the dovetail groove from cracking and deforming during firing. That is, the soft colloid 38 of the present invention makes it easier to achieve powder forming of dovetail grooves with special shapes.

[0054] Furthermore, as mentioned earlier, the flexible adhesive 38 is removable, allowing for flexible adjustments to its hardness (i.e., compression depth) to accommodate varying stress levels at different locations during tile installation. Additionally, the portion of the flexible adhesive 38 protruding from the ejector head 34 can be formed into a cylindrical shape other than a cylinder, such as a prism. Moreover, the flexible adhesive 38 can be of uniform height, arranged in an orderly or random pattern with varying heights, or in an orderly or random pattern of various shapes. This enables highly efficient and convenient rapid production changeovers for dovetail grooves required for tiles of different sizes and thicknesses, which is extremely beneficial on large-scale production lines in factories.

[0055] In the specific installation of this invention, the ejector plate 6, return plate 5, powder cleaning plate 4, and mold core body 1 are arranged sequentially from top to bottom, and are tightened and installed with screws through the inner connecting through hole 55 and the mold core connecting through hole 56. The piston head 31 of the movable ejector pin 3 is nested in the cylinder sleeve hole 51, and the movable ejector pin 3 passes through the return plate 5, powder cleaning plate 4, and mold core body 1. Before mold closing and brick breaking, the ejector pin head 34 retracts to the top of the ejector pin sleeve 11 and is balanced with the pressing contact part 14 to form a plane; during mold closing, as... Figure 2As shown, the air intake hole 42 draws air in, creating a negative pressure in the powder blowing and suction channel 41. This causes the air in the mold cavity to flow out through the exhaust gap 12 formed between the ejector head 34 and the ejector sleeve 11, as indicated by the arrow, and is quickly discharged from the powder blowing and suction channel 41 and air intake hole 42 of the powder cleaning plate 4, ensuring a fast and smooth mold closing action. During mold opening, the air blower blows air into the cylinder ejection port 57. The gas passes through the ejection air passage 61 to the end of the cylinder sleeve hole 51 near the ejector plate 6, causing the piston head of the movable ejector pin 3 to move downwards. The ejector head 34, as indicated by the arrow, flows out through the exhaust gap 12 formed between the ejector head 34 and the ejector sleeve 11, and is quickly discharged from the powder blowing and suction channel 41 and the air intake hole 42 of the powder cleaning plate 4, ensuring a fast and smooth mold closing action. Figure 3 As shown, the extended ejector sleeve 11 causes ceramic powder to fall out under gravity. To more thoroughly clean the powder in the venting gap 12, the blower blows air into the suction port 42. The gas carries the powder remaining in the venting gap 12 out through the venting gap 12. Subsequently, the blower blows air into the cylinder return port 52. The gas passes through the return air passage 53 to the end of the cylinder sleeve hole 51 near the powder cleaning plate 4. Since the return air passage 53, the piston head 31 and the powder cleaning plate 4 form an airtight space, the piston head 31 of the movable ejector 3 moves upward, and the ejector head 34 retracts into the ejector sleeve 11 and is balanced with the pressing contact part 14 on a plane, thus completing the return action and waiting for the next mold closing action.

[0056] At the same time, such as Figure 4 As shown in (c), the soft colloid 38 is fixed on the ejector head 34 of the movable ejector pin 3. The soft colloid 38 is in contact with the powder. During the powder stamping process, the soft colloid 38 is compressed and deforms in a direction perpendicular to the stamping direction. Since one side of the soft colloid 38 is in contact with the ejector head 34, it hardly undergoes elastic deformation, while the other side undergoes large expansion deformation. The powder is thus squeezed to form corresponding concave grooves. After the press is depressurized, the soft colloid 38 is no longer under pressure and its shape recovers. The resulting rebound force helps the blank to be demolded smoothly. Since the soft colloid recovers its shape after depressurization and thus demolds smoothly, the present invention does not require any additional release agent during demolding, improving the demolding efficiency of the press and reducing costs. The internal cross-sectional dimension of the concave groove formed on the back of the tile is larger than the opening cross-sectional dimension, thus becoming a ceramic blank with a bidirectional dovetail groove back pattern, which can significantly improve the bonding strength when the tile is laid. Furthermore, as mentioned earlier, compared to other rigid materials, powder tends to adhere to the surface of rigid materials (including rigid plastics) during powder molding. For example, in existing technologies, the outer ring of the ejector pin is still made of rigid material, while the inner thin layer is made of rigid plastic. The demolding effect is far inferior to that of the flexible colloid 38 of this invention, which has better elasticity. During powder molding, the powder is less likely to adhere to the surface of the flexible colloid 38, whereas with other rigid materials, the powder tends to adhere to the surface of the rigid material. Simultaneously, by utilizing the rebound force to generate a force that detaches from the dovetail groove wall, the flexible colloid 38 automatically separates from the ceramic tile body, achieving smooth demolding, greatly improving demolding efficiency and molding speed.

[0057] In the prior art, movable ejector pins, such as Figure 14 As shown, to prevent ceramic powder from adhering to the ejector pin and causing the entire ceramic blank to be scrapped, a hard adhesive layer is provided at the other end of the ejector pin. However, this hard adhesive layer is prone to peeling off over long-term use. Therefore, to increase the firmness between the ejector pin tip and the hard adhesive layer, a rigid outer ring is integrally formed from top to bottom on the ejector pin, and a thin layer of hard adhesive is bonded to the inner ring of the tip with an adhesive, thereby increasing the bonding area to achieve the above purpose. In other words, a rigid outer ring is integrally formed outside the hard adhesive layer. Therefore, the ejector pin is a rigid structure as a whole, making it impossible to form a multi-directional dovetail groove on the back of the ceramic.

[0058] In contrast, this invention improves the structure of the tip of the movable ejector pin 3. By installing the soft colloid 38, a multi-directional dovetail groove can be formed. This not only better prevents ceramic powder from sticking to the ejector pin head 34 during mold closing, thus preventing the entire ceramic blank from being scrapped, but also more reliably prevents the soft colloid 38 from falling off. As a result, the conventional movable ejector pin venting mold is transformed into a movable ejector pin ceramic tile back pattern venting mold core, which combines the functions of venting and manufacturing multi-directional dovetail grooves, greatly expanding the application range of the device.

[0059] Therefore, this invention not only solves the problem of gas discharge during the mold closing and brick making of ceramic bricks, but also, because air is drawn in through the air intake vent 42 during mold closing, a negative pressure is formed in the powder blowing and suction channel 41, causing the air in the mold cavity to be expelled more quickly, like an arrow; in addition, the blowing through the air intake vent 42 ensures that the powder remaining in the vent gap 12 can be completely discharged from the mold, avoiding the accumulation of ceramic powder and blockage of the vent vent 2. Furthermore, this invention also provides a soft colloid 38 at one end of the movable ejector pin 3, thereby enabling the simple and quick creation of multi-directional dovetail groove back textures with excellent bonding strength, further reducing the possibility of powder sticking to the movable ejector pin 3, resulting in better molding effect, higher efficiency, and the ability to form multi-directional dovetail groove layouts of various depths according to actual needs. In addition, all actions of this invention can be operated automatically, realizing automated production, greatly reducing manual operation, lowering production costs, and eliminating the need to stop the machine to clean the powder in the vent vents, thus greatly improving production efficiency.

[0060] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely one specific embodiment of the present invention and are not limited to the scope of protection of the present invention. The present invention can be embodied in various forms without departing from its essential characteristics. Therefore, the embodiments described herein are for illustrative purposes only and not for limitation. Since the scope of the present invention is defined by the claims rather than the specification, all changes falling within the scope defined by the claims, or their equivalents, should be understood to be included in the claims. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A movable ejector pin type ceramic tile back pattern venting mold core, comprising a mold core body, vent holes, movable ejector pins, a powder cleaning plate, and a return plate, wherein the return plate, the powder cleaning plate, and the mold core body are tightly installed sequentially from top to bottom; the mold core body is provided with a plurality of vent holes, the vent holes penetrating the mold core body; the powder cleaning plate is provided with a powder blowing and suction channel communicating with the vent holes; a movable ejector pin capable of telescopic movement is provided within the vent holes, the movable ejector pin penetrating the return plate, the powder cleaning plate, and the mold core body; the powder cleaning plate is also provided with a powder blowing and suction hole, one end of the powder blowing and suction hole communicating with a suction machine, and the other end of the powder blowing and suction hole communicating with the powder blowing and suction channel, characterized in that: The movable ejector pin is a cylinder, comprising a piston head, a piston, an ejector pin body, and an ejector pin tip. The piston head is located at one end of the movable ejector pin and is connected to the piston. The other end of the piston is connected to the ejector pin body, and the tip of the ejector pin body is connected to the ejector pin tip. A soft colloid is provided at the other end of the ejector pin tip. The soft colloid is installed on the ejector pin tip in a manner that completely covers the other end of the ejector pin tip. The soft colloid is formed by protruding from the end of the ejector head, and the protruding part is formed in a cylindrical shape. The soft colloid is formed in the same cylindrical shape as the ejector head and has the same diameter. When pressing the tile, the cylindrical end face of the soft colloid away from the ejector head undergoes compressive elastic deformation of 15% to 30% to form a multi-directional dovetail groove with a depth of 0.4 to 3.2 mm on the back of the tile. The soft colloid is in a sub-liquid state. When the piston head of the movable ejector moves upward, the soft colloid returns to its original shape when it is no longer under pressure, and the soft colloid automatically detaches from the tile body.

2. The movable ejector pin type ceramic tile back pattern venting mold core according to claim 1, wherein a groove is formed around the outer surface of the cylinder in the circumferential direction, and a corresponding flange is formed on the tip of the ejector pin, and the two are detachably installed and fixed by means of engagement.

3. The movable ejector pin type ceramic tile back pattern venting mold core according to claim 1, wherein the soft colloid is bonded and fixed to the other end of the ejector pin head by an adhesive.

4. The movable ejector pin type ceramic tile back pattern venting mold core according to claim 1, characterized in that, The soft colloid is polyurethane or vulcanized rubber.

5. The movable ejector pin type ceramic tile back pattern venting mold core according to claim 1, characterized in that, The hardness of the soft colloid is 50 to 80 Shore hardness.

6. The movable ejector pin type ceramic tile back pattern venting mold core according to claim 1, characterized in that, The soft colloids are arranged at the same height or randomly at varying heights.

7. The movable ejector pin type ceramic tile back pattern venting mold core according to claim 1, characterized in that, The soft colloid is distributed in concentric circles, parallel circles, or interlaced circles, or randomly distributed with varying density.

8. A product manufactured from a movable ejector pin type ceramic tile back pattern venting mold core according to any one of claims 1 to 7.

9. A method for manufacturing ceramic tiles using a movable ejector-type ceramic tile back pattern venting mold core according to any one of claims 1 to 7, wherein the movable ejector-type ceramic tile back pattern venting mold core is further provided with an ejector plate, and the return plate further includes a cylinder liner hole, a cylinder return air hole, and a return air passage, one end of the cylinder return air hole is connected to a blower or a suction machine and the other end is connected to the return air passage, and the other end of the return air passage is connected to the end of the cylinder liner hole near the cleaning plate; the ejector plate is tightly disposed above the return plate, and the ejector plate is provided with at least one ejector air passage relative to the return air passage of the return plate, the ejector air passage is connected to the end of the cylinder liner hole near the ejector plate, the return plate is provided with a cylinder ejector air hole, one end of the cylinder ejector air hole is connected to a blower, and the other end of the cylinder ejector air hole is a notch, which connects to the ejector air passage when the ejector plate and the return plate are tightly installed; The method includes the following steps: Ceramic powder is pre-placed in the press mold cavity, and the mold core body descends into the press mold cavity where the powder is placed and comes into complete contact with the powder; The blower blows air into the cylinder's ejector port. The air passes through the ejector air passage to the end of the cylinder liner hole near the ejector plate, causing the piston head of the movable ejector pin to move downwards. The ceramic powder falls off under the influence of gravity. At the same time, the soft colloid of the movable ejector pin comes into contact with the powder and is deformed by pressure, forming a multi-directional dovetail groove on the surface of the powder. The air blower blows air into the return air port of the cylinder. The air passes through the return air passage to the end of the cylinder liner hole near the cleaning plate. Because the return air passage, piston head, and cleaning plate form an airtight space, the piston head of the movable ejector pin moves upward, the soft colloid is no longer under pressure, its shape is restored, and the soft colloid automatically separates from the ceramic tile body. The ejector head retracts into the ejector sleeve and becomes level with the pressing contact part, completing the return stroke.

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